543520161 has 12 divisors (see below), whose sum is σ = 785866900. Its totient is φ = 361985760.

The previous prime is 543520157. The next prime is 543520189. The reversal of 543520161 is 161025345.

It can be written as a sum of positive squares in 2 ways, for example, as 463971600 + 79548561 = 21540^2 + 8919^2 .

It is not a de Polignac number, because 543520161 - 2² = 543520157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (543520151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20386 + ... + 38763.

Almost surely, 2^543520161 is an apocalyptic number.

It is an amenable number.

543520161 is a deficient number, since it is larger than the sum of its proper divisors (242346739).

543520161 is a wasteful number, since it uses less digits than its factorization.

543520161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60176 (or 60173 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 543520161 is about 23313.5188463689. The cubic root of 543520161 is about 816.0909329531.

The spelling of 543520161 in words is "five hundred forty-three million, five hundred twenty thousand, one hundred sixty-one".